Machine for forming spiral flutes



Sept. 4, 1923;

T. "M. REES 4 v MACHINE FOR FORMING SPIRAL FLUTES Filed Feb. 26. 1926 2 Sheets-Sheet 1 fi ,1 fl g 53% Sept. 4, 1923.

T. M. REES MACHINE FOR FORMING SPIRAL FLUTES 2 Sheets-Sheet 2 Filed Feb. 26. 1920 reference may be had to the appendedgeie planatory sheet ofrdrawings, upon which *1/ (ZZZ .uw zom it ma concern Patented Sept. 1923.

"new eennnns; ENGLAND. a

' MACHINE iron, ma /um sterner rLUTEs.

Application 'fi 'eaf ass y 26, 192i}. sees 3s1,45is.

. Be it known that I; THOMAS Monenn .Rnns, asubjectof the Kingdom of Great "Britain, residing at 48 Defoe Avenue, Kew- Gardens, in the county of Surrey, England, ave invented certain new and 'useful I'nn 'provements in Machines for Forming Spiral 'Flutes,of which theqfollowing is a'specification". 7 i

This invention co mprises certain imp-rovenents in or relating tothe mode of and means for forming spiral flutes or coarse a thread formations on bars for the productionof twist drills and for other purposes, inwhich the spiral flutesorthe like are pro; duoed upon a rod or bar by forging between suitable hammer dies, the rod or bar to be forged being fed forward between the dies by the rotation of a member or part to'Which said rod is connected by a suitable chuck.

-According to the present invention, the feeding of the rod. or' bar to be forged be tween the hammer dies is effected by tl1erotation of a spindle having fiutes, spirals or threads formed thereon corresponding or coinciding with the flutes'ortwist to be forged upon the rod by the dies.

In this invention therefore, whenfi't is desired to for e spiral flutes upon the rod,

' axial nioveme wheel furnlshed upon same.

view of one of iguire his an elevation sho fi ed former my invention.

1 V asuitable machine orapparatus for carrying 45 i F 3 "Figure 2 is an'enlarged detail sectional I In; an embodiment of this invention" the machine for feed ng the bar consists of av the rotatable feeding member tofwhich the said rod is connected is also formed with spiralflutes corresponding with thoseto be forged, and a fixed bearing-.member fur: nished' with internal flutes is provided for rotatably receiving the flute feeding spindle. The feeding spindle is rotated during the nt thereofiby-means of a hand In order that thisinvention be clearly understood and readily, carried into practice,

Figure '1 is afront elevation illustrating out the .presentIinvention; V

th bearings for-the feeding j spindlep 1,

1 Figure 3 V detail perspective of i i wing a m an form I'ofheadstock a wliiohis mounted "i011 a di'es becoming slightlvtwisted after being THOMAS MORGAN nnns, 10F.

longitudinal slide 2;, which siicieI-b is rat tachedto a vertically sl-iding pillar c which is adapted to allow of vertical and angular adjustment "of the headstock a such headstock carrying ,aspindle 03 having a'master spiral or screw-l thread d on'one part of it,':

and being adapted to engage with a fixed tapping in the headstock. a, formed to coin-- The. rear end of the spindle cl is cide with the spiral or screwthread to be provided with fa hand wheel e, while the front end of the spindle is provided with a jsuitab le chuok' f for attachment to the end 0f the rod 9 'onfwhich the spiralis'to be formed, the wholebeing adapted'to .elfect the feeding of the "rod g in between the split dies h ina power hammer i, which dies h are,

"so formedas to produce the required spiral or twist on the rod 9 as the spindle cl is slowly rotated and fed forward by the hand wheel e'during the forging of the rod g be'-;

tween the dies in the hammer, the master] spindle (Z on its engagement with thefixed threadsoi controlling the feed as to give the .v

correct lead to the rod g at every stroke of the hammer. s a j a below the head The longitudinal slide stockfa is provided for the purpose/ 0f en-.-

ablin the quick adjustment of any length of ro to be forged, while the sliding pillar: 0' is adapted to be raised or lowered, so as to enable the machine to be set to the correct alignment of the dies 71-, and also for adjusting in an angular direction in case of the keyed in the hammer. The headstock a is also capable of a cross traversingmovement v V at right angles to the longitudinal traverse of the sp wheel 7c." V

The spindle bearings. d in headstock a are each formed initwo parts and "con-' j a trolled both above-and below the spindle by a I coiledsprings j,'so as to allow-for vibration and distortion ijof the :metal process of forging.

, during the In lieu of or in ad indle by the 1 operation of hand, i

ioo

h V dition to the spring mounted bearings a the vibration and dis-f Q tomes of the metal during forging-may b'e allowed for by the provi'sion of two universal joints i (K in the spindle;d, advantageously@ positive feeding movementof the spindle at a position adjacent toanid at the rear of? the. chuck f, a'short link'being provided-be tween the twojoints; 'lnthis manner-a a and bar or rod would be efiected Whileat the same" time tortion. 1 j V V I The operation is as folloWs :The heated bar being placed between thedies in the hammer the top die is' set workingthe first blow forming a. partoif the spiral, 'Wl1lCl1 spiral upon the revolving and feeding for Ward of the baris formed to coincide with the required shapeof the complete spiral,

oons'equently it is necessary andessential] that the feed should beinoorrect relationto the repeated blows of the han'imen- What 1 (51mm as my invention amide- I sire to s'ecurebvLetters "Patent is} 1 MeanS for forming epiral fintes 01' coarse threads on bars or r ods forlthe production oi twist d 'ille" and for": other purposes, oomprising hammer dies, a feeding spindle mounted for rotat on" and provlded With a master spiral, fintee orthreaid (Loincidin oi corr'es 'ondin with the flutes or twistto be fopgedupon the rod by the dies,

and also provided With universaljjoint's, and

allowing for 'vibration and dis vem nt an djustme tirny handf means for Supporting the rod or bar and feeding same to the forging hammer, said supporting means belng arranged? for vertioal, lateral, longitudinal and angular 2. Means for forming spiralv flutes or 'coarse threads on bars or rods for: the productlon of twist drills and for other -purf, q r ,l

poses, comprls mg hammer dles, a feeding epindle mounted i'or "rotatigm, and provided With a master ep'li al, flutesfoi threa ds coin- (l lgllllgl or oonrespondmg with the "flutes or twist to be fofged Lipon the iod by the dies,

and headstoelgs, bearings for ls aicli feec'ling rspindle mounted forjv eftiealanovement in the headstooks, springs-exgeifting their en n 'eainstlf e'i b r ge' Permit slight'vertioal vibration thereof, thereby a1- lowing for. distortion of the metal and absorbing I vibration. v p

- In wltness f hereof haviieruhw set THOMAS MORGAN Ben's. 

